Second Ceiden – UPM Workshop: “Accident Tolerant Fuels for LWRs” Date 20 May 2020, from 09:00 to 13:00h. Presentations Introduction and Program Arjan Plompen (European Commission, Joint Research Centre) – “The JEFF nuclear data file and the need for your development goals” Allan Simpson (UK National Nuclear Laboratory) – “Nuclear Data for ATF: A UK Perspective” Cedric Cozzo (Paul Scherrer Institut, Switzerland) – “PSI developments on ATF” Robert Kilger (Global Research for Safety) – “Current neutronics activities on LWR ATF at GRS” INGENIA UPM – “UPM – CDIO Project in Nuclear Engineering Education” INGENIA UPM – “PWR 3D Core Simulation using different ATF cladding materials” INGENIA UPM – “PWR 3D Core Simulation using different ATF fuels” INGENIA UPM – “Simulation of the Power Maneuvering of PWRs using new ATF” Daniel Cano (CIEMAT) – “Emerging activities on nuclear data for ATF at CIEMAT” Summary record